643059848 has 8 divisors (see below), whose sum is σ = 1205737230. Its totient is φ = 321529920.

The previous prime is 643059841. The next prime is 643059863. The reversal of 643059848 is 848950346.

It can be written as a sum of positive squares in only one way, i.e., 643028164 + 31684 = 25358^2 + 178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (643059841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40191233 + ... + 40191248.

Almost surely, 2^643059848 is an apocalyptic number.

It is an amenable number.

643059848 is a deficient number, since it is larger than the sum of its proper divisors (562677382).

643059848 is a wasteful number, since it uses less digits than its factorization.

643059848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80382487 (or 80382483 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 643059848 is about 25358.6247261164. The cubic root of 643059848 is about 863.1450769771.

The spelling of 643059848 in words is "six hundred forty-three million, fifty-nine thousand, eight hundred forty-eight".